27773532749 has 2 divisors, whose sum is σ = 27773532750. Its totient is φ = 27773532748.

The previous prime is 27773532691. The next prime is 27773532793. The reversal of 27773532749 is 94723537772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27583230724 + 190302025 = 166082^2 + 13795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27773532749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27773532694 and 27773532703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27773537749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13886766374 + 13886766375.

It is an arithmetic number, because the mean of its divisors is an integer number (13886766375).

Almost surely, 2^27773532749 is an apocalyptic number.

It is an amenable number.

27773532749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27773532749 is an equidigital number, since it uses as much as digits as its factorization.

27773532749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15558480, while the sum is 56.

The spelling of 27773532749 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred thirty-two thousand, seven hundred forty-nine".